CN106104172A

CN106104172A - Refrigerating circulatory device

Info

Publication number: CN106104172A
Application number: CN201480077034.9A
Authority: CN
Inventors: 岛津裕辅
Original assignee: Asahi Glass Co Ltd; Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp; AGC Inc
Priority date: 2014-03-17
Filing date: 2014-03-17
Publication date: 2016-11-09
Anticipated expiration: 2034-03-17
Also published as: WO2015140879A1; EP3128257A1; EP3128257A4; US20170082333A1; JPWO2015140879A1; CN106104172B; JP6177424B2; EP3128257B1

Abstract

It is an object of the invention to provide a kind of safety and the high refrigerating circulatory device of performance, even if the cold-producing medium that disproportionated reaction occurs is used for refrigerating circulatory device, it is also possible to avoid the formation of the situation of the condition that cold-producing medium reacts chainly.Refrigerating circulatory device will at least include the first cold-producing medium, and there is the mixed non-azeotropic refrigerant of the second refrigerant higher than the characteristic of described first cold-producing medium for the boiling point at the same pressure as standard composition cold-producing medium work, refrigerating circulatory device has: be sequentially connected with compressor, First Heat Exchanger, expansion valve, the major loop of the second heat exchanger, and the composition separating circuit being connected with major loop, first cold-producing medium has the characteristic that disproportionated reaction occurs, composition separating circuit has following structure, under the Separate Storage pattern that the composition forming cold-producing medium to standard separates during operating, isolate the mix refrigerant that the ratio of components of the first cold-producing medium is high compared with standard composition cold-producing medium and store from major loop.

Description

Refrigerating circulatory device

Technical field

The present invention relates to a kind of refrigerating circulatory device that mixed non-azeotropic refrigerant is used as duty cryogen.

Background technology

In recent years, in order to suppress the impact of global greenhouse effect, low GWP cold-producing medium is being developed.Used in the past R410A is the cold-producing medium of excellent performance, but GWP (global warming potential) is about 2000, therefore gradually uses and as GWP is The R32 of about the 1/3 of R410A.R32 be compared with R410A physical property close to and the cold-producing medium of excellent performance, GWP is about 600, In order to realize low GWPization further, develop the tetrafluoropropene classes such as HFO1234yf (HFO class) cold-producing medium.But this cold-producing medium is Higher boiling cold-producing medium, is the cold-producing medium that performance is low.If wanting to maintain performance as in the past, technical task is many, there is cost The possibility improving.

It is accompanied by this, it is proposed that a kind of use global warming potential little and low-boiling cold-producing medium (such as HFO1123) The scheme (with reference to patent document 1) of refrigerating circulatory device.

It is known that do not have chlorine atom in the composition of HFO1123, therefore the impact on ozone layer is few, and there is double bond and Atmospheric lifetime is short, and therefore the impact on global greenhouse effect is few, and performance (ability) excellent (low boiling point refrigerant).In addition, According to U.S. heating, Refrigeration & Air-Conditioning SE (ASHRAE), its burning block belongs to and is equivalent to (the humble combustion of grade 2L Property) category, there is security.

And, even if the cold-producing mediums such as HC, HFC, HCFO, CFO, HFO are mixed in HFO1123, also can be as hybrid refrigeration Agent plays such strong point partly.

Citation

Patent document

Patent document 1: International Publication No. 2012/157764

Content of the invention

Invent problem to be solved

It is known that such HFO1123 (CF2=CHF) is the cold-producing medium of excellent performance, but under given conditions can There is disproportionated reaction (selfdecomposition reaction).Disproportionated reaction refers to plural molecule of the same race and reacts with each other and generate two kinds The chemical reaction of the product of above xenogenesis.

The disproportionated reaction of HFO1123 is following chemical reaction.

CF2=CHF → (1/2) CF₄+ (3/2) C+HF+ (reaction heat)

Such reaction produces because the energy of local is put on cold-producing medium.Further, if existed at high temperature, high pressure The problem being possible under environment react chainly.

The present invention completes to solve problem as described above, its objective is to provide a kind of refrigerating circulatory device, Even if the cold-producing medium of such generation disproportionated reaction being used for refrigerating circulatory device also it can be avoided that form cold-producing medium and send out chainly The situation of the condition of raw reaction and safety and performance are high.

For solving the scheme of problem

Mixed non-azeotropic refrigerant is carried out work as standard composition cold-producing medium by refrigerating circulatory device involved in the present invention, Described mixed non-azeotropic refrigerant at least include the first cold-producing medium and have at the same pressure boiling point higher than described first system The second refrigerant of the characteristic of cryogen, described refrigerating circulatory device includes: major loop, described major loop be sequentially connected with compressor, First Heat Exchanger, expansion valve and the second heat exchanger；And composition separating circuit, described composition separating circuit and described master return Road connects, and described first cold-producing medium has the characteristic that disproportionated reaction occurs, and described composition separating circuit has following structure, right Under the Separate Storage pattern that the composition of standard composition cold-producing medium separates during operating, from major loop, isolate the first cold-producing medium Ratio of components higher than the standard composition mix refrigerant of cold-producing medium and store.

Invention effect

According to refrigerating circulatory device involved in the present invention, the low of disproportionated reaction will be susceptible to during as separate refrigeration agent First cold-producing medium of boiling point refrigerant mixes with the second refrigerant as higher boiling cryogen and forms mixed non-azeotropic refrigerant, Composition separating circuit, under Separate Storage pattern, isolates the ratio of components of the first cold-producing medium higher than standard composition system from major loop The mix refrigerant of cryogen simultaneously stores, therefore, it is possible to make the ratio of components of the cold-producing medium of circulation in refrigerating circulatory device rich in Higher boiling composition (second refrigerant), suppresses disproportionated reaction.

Brief description

Fig. 1 is the summary construction diagram of the refrigerating circulatory device involved by embodiment one.

Fig. 2 be the refrigerating circulatory device involved by embodiment one in mixed non-azeotropic refrigerant high pressure, intermediate pressure, Temperature under each pressure of low pressure is to composition line chart.

Fig. 3 is the summary construction diagram of the refrigerating circulatory device involved by embodiment two.

Fig. 4 is the summary construction diagram of the refrigerating circulatory device involved by embodiment three.

Detailed description of the invention

Hereinafter, based on accompanying drawing, embodiments of the present invention are illustrated.

In addition, the structure etc. of following explanation is an example, refrigerating circulatory device involved in the present invention is not limited to this The structure etc. of sample.

Further, the structure for details suitably simplifies or omits diagram.

Further, the explanation repeating or be similar to suitably is simplified or omitted.

Embodiment one

First, the structure of refrigerating circulatory device is illustrated.

As it is shown in figure 1, the refrigerating circulatory device involved by embodiment one utilizes the refrigerant piping as main path 8 to depend on Heat exchanger the 5th, the first expansion valve 6 between secondary connection compressor the 1st, the first condenser the 2nd, gas-liquid separator the 3rd, the second condenser the 4th, cold-producing medium And evaporimeter 7, form kind of refrigeration cycle.It is arranged at the side outlet 3a on the top of gas-liquid separator 3 and the second condenser 4 connects Connect.

The hydraulic fluid side outlet 3b of the bottom being arranged at gas-liquid separator 3 is connected with compressor 1 via bypass path 9.Bypass (pressure of the centre of intermediate pressure=high pressure and low pressure, in being hereinafter referred to as path 9 and the intermediate pressure part within discharge chambe Pressure) connect.Further, it is configured with heat exchanger 5 between the second expansion valve 10 and cold-producing medium in bypass path 9.Heat exchanger 5 between cold-producing medium High pressure (high temperature) side be connected between the second condenser 4 of main path 8 and the first expansion valve 6, between cold-producing medium in heat exchanger 5 Pressure (middle temperature) side is connected between the second expansion valve 10 of bypass path 9 and compressor 1.

The duty cryogen of the refrigerating circulatory device involved by embodiment one is mixed non-azeotropic refrigerant, by the first system Cryogen and second refrigerant are constituted.First cold-producing medium have high temperature, high pressure under conditions of, get over when applying certain energy It is susceptible to the characteristic of disproportionated reaction.Second refrigerant be have with first cold-producing medium the same terms under with the first cold-producing medium phase Cold-producing medium than the characteristic being not susceptible to disproportionated reaction (or disproportionated reaction does not occur under the same conditions completely).That is, first Cold-producing medium be have under the pressure that disproportionated reaction does not occur with second refrigerant and the specified conditions that temperature is identical (high temperature, Under condition of high voltage) there is the cold-producing medium of the high characteristic of possibility of disproportionated reaction.Further, second refrigerant has in uniform pressure Lower boiling point is higher than the characteristic of the first cold-producing medium (being difficult to evaporation).

In addition, the position applying certain energy to the first cold-producing medium is mainly inside compressor.Reach the circuit of motor Footpath is in cold-producing medium atmosphere, because short circuit, leakage cause electric flux to put on cold-producing medium.Further, inside compressor, constantly from Compressor, sliding part, bearing etc. produce frictional heat and put on cold-producing medium as energy.In normal operating not yet so, If particularly because some reason causes compressor injury, then the possibility of energy supply increases.

As the first cold-producing medium, for example, can use HFO1123, need to imagine disproportionated reaction.As second refrigerant, example If using R32, HFO1234yf, HFO1234ze etc..General in the refrigerator oil of cold-producing medium, contain additive, as the The reaction suppressor of one cold-producing medium comprises monocyclic monoterpene.Further, monocyclic monoterpene for example comprises citrene.

Additionally, it is well known that, the reaction when the mol ratio of the first cold-producing medium is below 70% is easily subject to suppression.Further, Second refrigerant is not limited to one, it is also possible to be two or more.But second refrigerant needs to be that boiling point is higher than the first cold-producing medium Cold-producing medium.

It follows that the action to cold-producing medium illustrates.It is the gas system of HTHP from the cold-producing medium that compressor 1 is discharged Cryogen, utilizes the first condenser 2 to carry out heat exchange with water, air and condense the two-phase state becoming high pressure.Enter gas-liquid separation Device 3 and the gas refrigerant that is separated escapes and enter the second condenser 4 from side outlet 3a, again enter with water, air Row heat exchange and condense the liquid refrigerant becoming high pressure.Enter between cold-producing medium from the liquid refrigerant that the second condenser 4 is discharged Heat exchanger 5, carries out heat exchange with the two-phase system cryogen of the middle pressure of flowing in bypass path 9 and is further cooled by becoming supercooling But liquid condition, is reduced pressure by the first expansion valve 6 and becomes the two-phase state of low pressure.Evaporimeter 7 is utilized to carry out heat friendship with empty gas and water The cold-producing medium changing and evaporating becomes the gas refrigerant of low pressure, is again attracted to compressor 1.Further, by gas-liquid separator 3 points The liquid refrigerant separating out is discharged from hydraulic fluid side outlet 3b and is reduced pressure by the second expansion valve 10, utilizes heat exchanger 5 between cold-producing medium to add Heat and evaporate become the gas refrigerant of middle pressure and be attracted to compressor 1.

In addition, the cold-producing medium of flowing in main path 8 is referred to as main refrigerant involved in the present invention, will be in bypass path In 9, the cold-producing medium of flowing is referred to as bypass refrigerant.

It follows that the effect of the refrigerating circulatory device involved by present embodiment illustrates.

Utilizing the structure of such refrigerating circulatory device, in gas-liquid separator 3, the two-phase system cryogen of inflow is separated into Gas phase and liquid phase.Consequently, it is possible to owing to the boiling point of the first cold-producing medium is less than the boiling point (easily evaporation) of second refrigerant, therefore gas The ratio of components of the first cold-producing medium in phase is high, and the ratio of components of the first cold-producing medium in liquid phase is low.Therefore, from the second condenser the 4th, In the main path 8 of the first expansion valve the 6th, evaporimeter 7 to compressor 1, the ratio of components as the first cold-producing medium of low boiling point component is high. Usual low boiling point refrigerant excellent performance, therefore the performance of the refrigerating circulatory device of present embodiment one is high.

Further, from gas-liquid separator 3 discharge liquid refrigerant in the state of the ratio of components of the first cold-producing medium is low from side Path 9 by and be attracted to compressor 1.In the inside of compressor 1, main path 8 collaborates with bypass path 9, due to bypass The cold-producing medium that the ratio of components of the first cold-producing medium in path 9 is low mixes with the cold-producing medium in main path 8, and therefore merging part is later The ratio of components of the first cold-producing medium is less than the ratio of components of the first cold-producing medium in main path 8.

Fig. 2 is used to illustrate each state in refrigerating circulatory device for this cold-producing medium.

As in figure 2 it is shown, in the case of mixed non-azeotropic refrigerant, temperature is lens shape to composition line chart, and upside is Saturated gas line, downside is saturated liquid line.Line chart represents pressure and the temperature of each several part of refrigerating circulatory device.

The gas refrigerant a of the high pressure conditions of the outlet of compressor 1 becomes by state b of the first condenser 2 partial condensation, It is separated into gas refrigerant c and liquid refrigerant d by gas-liquid separator 3.Gas refrigerant c is rich in the first cold-producing medium (low boiling Composition), by the second condenser 4 condensation liquefaction to state e, and further by heat exchanger between cold-producing medium 5 supercooling to state f.So After, it is decompressed to two-phase state g of low pressure by the first expansion valve 6.

On the one hand, become by the isolated liquid refrigerant d rich in second refrigerant (higher boiling composition) of gas-liquid separator 3 For being decompressed to state h of middle pressure by the second expansion valve 10.The cold-producing medium h of middle pressure between cold-producing medium in heat exchanger 5 with rich in first The cold-producing medium e of cold-producing medium (low boiling point component) carries out heat exchange, evaporation and after becoming soaking condition i, pass through from bypass path 9 and It is injected in compressor 11.

On the other hand, the cold-producing medium of two-phase state g discharged from the first expansion valve 6 utilizes evaporimeter 7 evaporation to become overheated Gaseous state m, and it is inhaled into compressor 1 and the gaseous state j that is compressed into middle pressure.State within compressor 1 is not entered Row diagram, the gas refrigerant of state j is mixed into the gas refrigerant of state k with the cold-producing medium i importing from bypass path 9, Compressed further and become the outlet cold-producing medium a of compressor 1.

As in figure 2 it is shown, the condition line of the cold-producing medium of main path 8 (c → e → f → g → m → j) formation low boiling point component (the One cold-producing medium) the kind of refrigeration cycle that ratio of components is high and performance is high.On the other hand, the cold-producing medium of bypass path 9 condition line (d → H → i) the ratio of components of low boiling point component (the first cold-producing medium) low, can be by making this cold-producing medium in compressor 1 and main path The cold-producing medium interflow of 8, and the ratio of components of the first cold-producing medium in making compressor 1 declines (j → k).

First cold-producing medium exists under high temperature, hyperbaric environment and recurs disproportionated reaction when being applied in certain energy Possibility, in compressor 1, owing to cold-producing medium becomes high temperature, high pressure, also easy at sliding part, power receiving section, motor etc. Producing the energy of local, therefore it requires security in refrigerating circulatory device most.

In the refrigerating circulatory device involved by embodiment one, disproportionation will be susceptible to when as separate refrigeration agent anti- First cold-producing medium of the low boiling point refrigerant answered mixes with the second refrigerant as higher boiling cold-producing medium and forms non-azeotrope and mix Close cold-producing medium, thus enable in particular to reduce the group of the first cold-producing medium inside the compressor of disproportionated reaction being susceptible to cold-producing medium Become ratio, disproportionated reaction can be suppressed by the dividing potential drop reducing the first cold-producing medium, and obtain the high refrigerating circulatory device of performance.

Further, the intermediate pressure part that the cold-producing medium of bypass path 9 is back in compressor 1, therefore, it is possible to reduce compression The input of machine 1.

With merely other cold-producing mediums are mixed in the first cold-producing medium so that the first cold-producing medium dividing potential drop (with fill composition Ratio is accordingly) decline and suppress the effect of reaction to compare, above-mentioned effect is bigger.

And, the first cold-producing medium is low boiling point refrigerant, therefore there is the possibility that effluent air temp in physical property uprises, Owing to the ratio of components of the first cold-producing medium in compressor 1 is low, therefore, it is possible to suppression effluent air temp.Therefore, it is possible to improve pressure The reliability of contracting machine 1, and suppress reaction.

In addition, the coupling part of bypass path 9 also can be the suction pipe arrangement of compressor 1.In the structure shown here, at compressor 1 arbitrarily for low pressure shell, high pressure shell in the case of, can make to be in around glass terminal, motor the group of the first cold-producing medium Become ratio under low environment, effectively prevent reaction.

Further, by with the inside of compressor 1 or discharging refrigerant become high temperature, high pressure (be susceptible to reaction) and The aperture making the second expansion valve 10 increases, thus can also reduce the ratio of components of the first cold-producing medium in compressor 1 it is thus possible to Suppression disproportionated reaction.

And, in the first condenser 2 and the second condenser 4, in the temperature carrying out the water of heat exchange, air with cold-producing medium In the case of spending high, the refrigerant temperature (saturation temperature of condensing pressure) in two condensers uprises.Now, the first cold-producing medium The critical-temperature of (such as HFO1123) is low, and the therefore outlet at the second condenser 4 is difficult to carry out supercooling, but can utilize system Between cryogen, heat exchanger 5 carries out supercooling, therefore, it is possible to improvement is as the shortcoming of low critical-temperature cold-producing medium.

Further, in the operating of the refrigerating circulatory device involved by embodiment one, in the first condenser 2 and gas-liquid separation There is the low liquid refrigerant of the ratio of components of the first cold-producing medium in device 3.Restart after stopping from this state refrigerating circulatory device When, reliably pass through bypass path 9 from gas-liquid separator 3 and supply the low refrigeration of the ratio of components of the first cold-producing medium to compressor 1 Agent.Can be by supplying the group of the first cold-producing medium to the compressor 1 of the energy easily damaging when starting and easily producing local Become the low cold-producing medium of ratio, the generation of suppression disproportionated reaction.

Similarly, can by starting compressor 1 when the aperture of the second expansion valve 10 be set greater than normal operation When aperture (such as maximum opening), the disproportionated reaction of the first cold-producing medium when suppression starts further.

Further, before refrigerating circulatory device stops, can be by being set smaller than normally the aperture of the second expansion valve 10 Aperture during operating more stores the low liquid refrigerant of the ratio of components of the first cold-producing medium in gas-liquid separator 3.Therefore, Reliably can supply cold-producing medium low for the ratio of components of the first cold-producing medium to compressor 1 when next time restarts.

In addition, the cold-producing medium being susceptible to reaction as the first cold-producing medium involved by embodiment one is also easy and different Thing reacts and reaction of formation product (mud).Accordingly it is also possible to form each heat exchanger utilizing this refrigerating circulatory device With the air-conditioning system of heat exchanger carrying out heat exchange as the water of hot transporting medium, bittern and transporting medium being carried to load side (cooler, secondary circuit system).In such air-conditioning system, do not implement the pipe arrangement work of refrigerating circulatory device self at the scene Journeys etc., therefore, it is possible to significantly suppress the managerial man-hours such as the management of the foreign matter to cold-producing medium, water management, air administrative.Cause This, can suppress the reaction of the first cold-producing medium.

Further, in the refrigerating circulatory device involved by embodiment one, mix the first cold-producing medium and second refrigerant this Two kinds of cold-producing mediums, it is also possible to mix more than three kinds cold-producing mediums.In such a situation, the first cold-producing medium needs to belong to low boiling Point.By forming such composition, owing to the ratio of components of the first cold-producing medium in the cold-producing medium of main path is high, the system of bypass path The ratio of components of the first cold-producing medium in cryogen is low, is therefore obtained in that the effect of suppression reaction equally.

Embodiment two

First, the structure of refrigerating circulatory device is illustrated.

The duty cryogen of the refrigerating circulatory device involved by embodiment two is identical with embodiment one, therefore to structure On difference illustrate.

As it is shown on figure 3, the 12nd, the refrigerating circulatory device involved by embodiment two is sequentially connected with compressor the 11st, oil eliminator Cross valve the 13rd, outdoor heat exchanger the 14th, outdoor expansion valve the 15th, indoor expansion valve the 16th, indoor heat exchanger the 17th, cross valve 13 and liquid storage Device 18, thus form kind of refrigeration cycle.Multiple indoor expansion valve 16 and indoor heat exchanger 17 are connected in parallel, the gas of oil eliminator 12 Side outlet 12a is connected with cross valve 13.Further, the oily return port 12b of oil eliminator 12 is via bypass path 19 and compressor 1 Connect.It is configured with throttling arrangement 20 in bypass path 19.

The duty cryogen of refrigerating circulatory device is by first cold-producing medium identical with embodiment one and second refrigerant The mixed non-azeotropic refrigerant constituting.

It follows that the action to cold-producing medium illustrates.

First, illustrate when to cooling operation.Cross valve 13 shown in Fig. 3 is transported in the state of connecting with solid line Turn, from compressor 11 discharge cold-producing medium become HTHP gas refrigerant and with the refrigerator oil within compressor 11 A part enters oil eliminator 12 together.The cold-producing medium entering in oil eliminator 12 is separated into gas refrigerant and refrigerator Oil, gas refrigerant passes through from cross valve 13, utilizes outdoor heat exchanger 14 (condenser) to carry out heat exchange with water, air and condense Become the liquid refrigerant of high pressure.Liquid refrigerant is become by least one party's decompression of outdoor expansion valve the 15th, indoor expansion valve 16 The two-phase state of low pressure.Then, each indoor heat exchanger 17 (evaporimeter) is utilized to carry out heat exchange with empty gas and water and evaporate and become low The gas refrigerant of pressure, passes through from cross valve 13 and reservoir 18, is again attracted to compressor 1.By oil eliminator 12 points The refrigerator oil separating out is sucked into compressor 11 from oil return port 12b by bypass path the 19th, throttling arrangement 20.

It follows that illustrate when heating is operated.Cross valve 13 shown in Fig. 3 is carried out in the state of connecting with dotted line Operating, is the gas refrigerant of HTHP from the cold-producing medium that compressor 11 is discharged, the refrigerator oil of the inside with compressor 11 A part enter oil eliminator 12 together.The cold-producing medium entering in oil eliminator 12 is separated into gas refrigerant and refrigerator Oil, gas refrigerant passes through from cross valve 13, utilizes indoor heat exchanger 17 (condenser) to carry out heat exchange with water, air and condense Become the liquid refrigerant of high pressure.Liquid refrigerant is reduced pressure into by least one party in indoor expansion valve the 16th, outdoor expansion valve 15 Two-phase state for low pressure.Then, outdoor heat exchanger 14 (evaporimeter) is utilized to carry out heat exchange with empty gas and water and evaporate and become low The gas refrigerant of pressure, from cross valve 13 and reservoir 18 by and be again attracted to compressor 1.By oil eliminator 12 points The refrigerator oil separating out is sucked into compressor 11 from oil return port 12b by bypass path the 19th, throttling arrangement 20.

It follows that the action to each expansion valve illustrates.Indoor expansion valve 16 to each indoor set suitably (with each indoor The load of machine is correspondingly) adjusting refrigerant flow rate.Transport with the inlet temperature of room air and the difference of design temperature or in refrigeration Be the degree of superheat (=evaporator outlet refrigerant temperature-evaporating temperature) of evaporator outlet cold-producing medium when turning, when heating operates Degree of subcooling (=condensation temperature-condensator outlet refrigerant temperature) for condensator outlet cold-producing medium etc. play heat exchanger performance Index based on, regulation indoor expansion valve 16 aperture.

Aperture is adjusted by outdoor expansion valve 15, in order to according to the predetermined aperture of operating condition or indoor swollen (details of aperture control exists the middle pressure (saturation temperature) that intermediate pressure between swollen valve 16 and outdoor expansion valve 15 is regulation Hereinafter narration).

In oil eliminator 12, gas refrigerant and the refrigerator oil of inflow are separated.Here, due to the first cold-producing medium Boiling point is less than the boiling point (easily evaporation) of second refrigerant, the first cold-producing medium of the cold-producing medium being therefore dissolved in refrigerator oil Ratio of components is low.Therefore, from cross valve the 13rd, outdoor heat exchanger the 14th, main path 21 that indoor heat exchanger 17 passes through, conduct is become The high state of the ratio of components of the first cold-producing medium of low boiling point component.Usual low boiling point refrigerant excellent performance, therefore this embodiment party The performance of the refrigerating circulatory device involved by formula two is high.

Further, refrigerator oil circulates between compressor the 11st, oil eliminator the 12nd, bypass path 19 and compressor 11, deposits It is that the ratio within compressor 11 increases.

The refrigerator oil discharged from the oily return port 12b of oil eliminator 12 and the cold-producing medium being dissolved in refrigerator oil are the In the state of the ratio of components of one cold-producing medium is low from bypass path 19 by and be inhaled into compressor 1.Suction side at compressor 11 In pipe arrangement, main path 21 collaborates with bypass path 19, the low cold-producing medium of the ratio of components of the first cold-producing medium in bypass path 19 with The cold-producing medium interflow of main path 21, therefore the ratio of components of the later cold-producing medium of merging part is less than the first cold-producing medium in main path 21 Ratio of components.

First cold-producing medium exists under high temperature, hyperbaric environment and recurs disproportionated reaction when being applied in certain energy Possibility, in compressor 11, owing to cold-producing medium is high temperature, high pressure, also easy at sliding part, power receiving section, motor etc. Producing the energy of local, therefore it requires security in refrigerating circulatory device most.

In the refrigerating circulatory device involved by embodiment two, above-mentioned structure can be utilized to reduce the interior of compressor 11 The ratio of components of first cold-producing medium in portion, can make the dividing potential drop of the first cold-producing medium decline and suppress chain reaction.Further, bypass The suction pipe arrangement interflow of footpath 19 and compressor 11, therefore in the case that compressor 11 is arbitrarily low pressure shell, high pressure shell, all Under the low environment of the ratio of components that can make to be in the first cold-producing medium around glass terminal, motor, effectively prevent reaction.

Further, in the case that throttling arrangement 20 can regulate aperture as expansion valve, internal at compressor 11 or In the case that discharging refrigerant temperature is high temperature, high pressure (being susceptible to reaction), can be by increasing the aperture of throttling arrangement 20 The ratio of components reducing the first cold-producing medium in compressor 11 suppresses disproportionated reaction.Can by only occur disproportionated reaction can The ratio of components reducing the first cold-producing medium in compressor 11 under conditions of energy property height reduces not needing from oil eliminator 12 The bypass of refrigerator oil, improve the performance of refrigerating circulatory device.

Further, in the operating of the refrigerating circulatory device involved by embodiment two, the ratio of components of the first cold-producing medium is low Liquid refrigerant is dissolved in the refrigerator oil in oil eliminator the 12nd, compressor 11 and exists.Stop from this state refrigerating circulatory device When restarting after Zhi, reliably supplied the ratio of components of the first cold-producing medium to compressor 11 by bypass path 19 from oil eliminator 12 Low cold-producing medium.Can be by supplying the first system to the compressor 11 of the energy easily damaging when starting and easily producing local The low cold-producing medium of the ratio of components of cryogen suppresses the generation of reaction.

Similarly, can be by the aperture of the throttling arrangement 20 during the starting of compressor 11 be set greater than normal operation When aperture (such as maximum opening) suppress the disproportionated reaction of the first cold-producing medium when starting further.

It follows that opening to the outdoor expansion valve 15 each needing refrigerant amount to increase during for making refrigeration and heating operate Degree control illustrates.

When cooling operation, as the outdoor heat exchanger 14 of condenser and outdoor expansion valve 15 and indoor expansion valve 16 Between connecting pipings there is the cold-producing medium (high-density refrigerant) of liquid refrigerant and low mass dryness fraction, need refrigerant amount almost Determine.When heating operates, as the indoor heat exchanger 17 of condenser and outdoor expansion valve 15 and indoor expansion valve 16 it Between connecting pipings there is the cold-producing medium (high-density refrigerant) of liquid refrigerant and low mass dryness fraction, need refrigerant amount almost true Fixed.Under normal conditions, needing refrigerant amount different when operating with heating during cooling operation, residual quantity is detained as residual refrigerant In refrigerating circulatory device.

Particularly, when being detained residual refrigerant from the path (in reservoir etc.) being exported to compressor 11 of evaporimeter When, in liquid refrigerant, the ratio of components of the first cold-producing medium is low, the ratio of components of the first cold-producing medium in the cold-producing medium therefore circulating High.Therefore, it is possible to reduce residual refrigerant simultaneously by the desired value of outdoor expansion valve 15 is set to, and residual refrigerant tails off And the ratio of components of reduction by first cold-producing medium of circulation in main path 21, the reaction of cold-producing medium can be suppressed.

If for example reduce the aperture of outdoor expansion valve 15 when heating operates, then can increase outdoor expansion valve 15 and indoor Intermediate pressure (density increasing) in pipe arrangement between expansion valve 16, makes to need refrigerant amount to increase.If expanding aperture, then room on the contrary Intermediate pressure in pipe arrangement between outer expansion valve 15 and indoor expansion valve 16 declines (density subtracts), needs refrigerant amount to decline.

If expand the aperture of outdoor expansion valve 15 when cooling operation, then can increase outdoor expansion valve 15 and indoor expansion Intermediate pressure (density increasing) in pipe arrangement between valve 16, makes to need refrigerant amount to increase.If reducing aperture on the contrary, then outdoor swollen Intermediate pressure in pipe arrangement between swollen valve 15 and indoor expansion valve 16 declines (density subtracts), needs refrigerant amount to decline.

Even if in addition, make the aperture of outdoor expansion valve 15 change, being independently adjusted indoor expansion valve 16 also described above Aperture, therefore to each indoor set supply suitable refrigerant flow corresponding with load.

Therefore, it is possible to by the control desired value of the outdoor expansion valve 15 during suitable setting cooling operation and when heating operates Increase the refrigerant amount that needs in the intermediate pressure pipe arrangement in refrigerating circulatory device, reduce residual refrigerant.

Here, total internal capacity of outdoor heat exchanger is said more than the situation of total internal capacity of indoor heat exchanger Bright.In this case, as the refrigerant amount in the outdoor heat exchanger of condenser during cooling operation more than as heating fortune Refrigerant amount in the indoor heat exchanger of condenser when turning.In order to do not produce residual refrigerant (=make in refrigeration and heating Need the refrigerant amount identical), need to make the density (pressure of the pipe arrangement between outdoor expansion valve and indoor expansion valve when cooling operation Power) reduce, make the density (pressure) of the pipe arrangement between outdoor expansion valve and indoor expansion valve increase when heating operates.That is, exist The aperture making outdoor expansion valve during cooling operation reduces, and makes the aperture of outdoor expansion valve increase when heating operates, so that system Cold and in heating the refrigerant amount that needs is same degree.Also can be using outdoor expansion valve aperture as control target.And, also Pressure sensor can be set detect pressure in position between outdoor expansion valve and indoor expansion valve, or temperature is set passes Sensor simultaneously calculates its saturation pressure by not shown control device, determines that pressure target value carrys out the outer expansion valve opening of operating room, So that the refrigerant amount that needs in refrigeration and heating becomes same degree.

If in the case of cannot regulating residual refrigerant amount merely with outdoor expansion valve 15, can be by making condensation The degree of subcooling increase and decrease of device outlet regulates the refrigerant amount in condenser, therefore, it is possible to expand regulated quantity and reliably reduce surplus Remaining cold-producing medium.

The refrigerant amount that needs being made circulation in refrigerating circulatory device by variable expansion valve in this wise is increased, and can pass through In suppressing compressor 11 from evaporator outlet to the minimizing of the chien shih residual refrigerant of compressor 11 (including inside compressor) The first cold-producing medium ratio of components increase, thus suppress reaction.

Embodiment three

First, the structure of refrigerating circulatory device is illustrated.

The duty cryogen of the refrigerating circulatory device involved by embodiment three is identical with embodiment one, therefore to structure On difference illustrate.

As shown in Figure 4, the SAPMAC method device involved by embodiment three utilizes refrigerant piping to be sequentially connected with compressor the 30th, The 33rd, the 31st, cross valve utilize side heat exchanger the 32nd, subcooler as expansion valve 34 and the heat source side heat exchanger of the first decompressor 35 and constitute, and be accommodated in refrigerating cycle unit 100.

Further, form separating circuit the 40th, to be used for storing cold-producing medium by as the cold-producing medium rectifier forming separating mechanism Cold-producing medium memory the 41st, the first cooler the 42nd, the second cooler the 43rd, as the capillary of the second decompressor the 44th, as the 3rd The capillary of decompressor is the 45th, as the first magnetic valve the 46th, the second magnetic valve 47 and the 3rd magnetic valve 48 structure of open and close valve Becoming, the first cooler 42 is annularly connected on the top of cold-producing medium rectifier 40 with cold-producing medium memory 41.In addition, these are wanted Element is accommodated in composition separative element 200.

These refrigerating cycle unit 100 and composition separative element 200 utilize the first pipe arrangement the 50th, the second pipe arrangement 51 and the This three pipe arrangements of three pipe arrangements 52 connect, and are configured to change the ratio of components of the cold-producing medium of circulation in refrigerant loop.

By the low boiling point component (such as HFO1123) as the first cold-producing medium and the higher boiling composition as second refrigerant The mixed non-azeotropic refrigerant being grouped into two kinds of one-tenth that (such as HFO1234yf etc.) are constituted is using the base as specific ratio of components Quasi-composition is filled in refrigerating circulatory device.

Enclose in the inside of cold-producing medium rectifier 40 for making the contact surface of gas-liquid connect the packing material of increase.Further, exist In the pipe arrangement of the discharge side of compressor 30, the bottom of cold-producing medium rectifier 40 is with the pipe arrangement warp connecting compressor 30 and cross valve 31 The first pipe arrangement 50 is utilized to connect by the first magnetic valve 46 and capillary 44.

Further, utilize the outlet side of side heat exchanger 32 with the pipe arrangement warp connecting the first cooler 42 and cold-producing medium memory 41 The second pipe arrangement 51 is utilized to connect by the second magnetic valve 47.

And, the bottom of the pipe arrangement of the suction side of compressor 30 and cold-producing medium rectifier 40 is via the 3rd magnetic valve 48 and hair Tubule 45 and utilize the 3rd pipe arrangement 52 to connect.

Like this, utilizing the first pipe arrangement 50, the second pipe arrangement 51 and the 3rd pipe arrangement 52 will be respectively accommodated in kind of refrigeration cycle list The refrigerating circulatory device of unit 100 and composition separative element 200 is connected with composition separating circuit, therefore will form separative element 200 when being connected with the refrigerating cycle unit 100 both deposited, it is not necessary to significantly alterring refrigerating cycle unit 100 ground both deposited makes connection Quantity is also few, and therefore follow-up connection is easy.

Further, in composition separating circuit, cold-producing medium rectifier 40 is via capillary 44 He as the second decompressor It is connected with high-pressure side and the low-pressure side of refrigerating circulatory device as the capillary 45 of the 3rd decompressor, therefore cold-producing medium rectifier 40 carry out action with intermediate pressure.Therefore, compared with the situation carrying out action with high pressure, liquid composition and gas group can be increased The difference (zeotropy increase) becoming, improves separative efficiency (being directly proportional to the concentration difference of liquid, gas).

It follows that as a example by Teat pump boiler the kind of refrigeration cycle involved by the present embodiment three being constituted as described above The action of device illustrates.

Teat pump boiler will utilize side heat exchanger 32 as water-to-water heat exchanger, using heat source side heat exchanger 35 as air heat exchange Device is driven.In this case, heat source side heat exchanger 35 carries out action as evaporimeter, utilizes side heat exchanger 32 as cold Condenser carries out action.Flow into the cold water as heated medium utilizing side heat exchanger 32 by the condensation latent heat heating of cold-producing medium Become hot water and supply to hot water storage tank etc..Further, the air as the medium that is cooled flowing into heat source side heat exchanger 35 is made It is discharged in air etc. after the evaporation latent heat cooling of cryogen.

In Teat pump boiler, make refrigerating circulatory device operate at night, utilize pump (omit diagram) from being fed with from the beginning Hot water storage tank's (omitting diagram) of water flows into water to the water-to-water heat exchanger utilizing side heat exchanger 32 and heats, thus hot water storage tank Interior water boiling.

The hot water of the user hot water storage tank of self-boiling in the future and water supply (running water) mixing, use with proper temperature.And And, increasing with usage amount, the hot water amount of hot water storage tank reduces, but as long as not becoming exsiccosis with regard to not mending by day Give (water supply).In the case of becoming exsiccosis, to circulating refrigerant is set as standard form and hot water storage tank storage The hot water of about 55 DEG C or be set as the ratio of components making second refrigerant (higher boiling composition) increase and store 70 DEG C on a small quantity Hot water suitably selects, and carries out reheating operating.

It follows that in the refrigerating circulatory device of present embodiment three, the ratio of components changing cold-producing medium (is equivalent to this Bright Separate Storage pattern) or the ratio of components of cold-producing medium is returned to standard composition (being equivalent to the discharge mode of the present invention) Action illustrates.

In the water heater involved by present embodiment, the cold-producing medium group of circulation in refrigerating circulatory device can be changed Become.For example can increase the ratio of components of second refrigerant (higher boiling composition) thus suppress high-pressure to rise, and carry out high temperature Hot water supply.And, additionally it is possible to the ratio of components of the first cold-producing medium (low boiling point component) is returned to refrigerating circulatory device and as Standard forms, and improves low-temperature heat ability.

For example, in order to make rapidly water temperature rise when hot water supply operation starts thereafter, by the circularly cooling of refrigerating circulatory device Agent is set as that standard forms, and makes low-temperature heat ability improve.Then, the temperature in hot water storage tank rises to a certain degree (for example 55 DEG C) when, make the ratio of components of the second refrigerant (higher boiling composition) of circulating refrigerant increase, be heated to high temperature (such as 70 ℃).Then, the hot water supply temperature in maintenance hot water storage tank, declines from high temperature (such as 70 DEG C) to cause because of radiation loss The amount of temperature feed, therefore, it is possible to so that the ratio of components that second refrigerant (higher boiling composition) increases operates.

First, in the case of changing the ratio of components of cold-producing medium of circulation in refrigerating circulatory device (Separate Storage pattern) Action illustrate.

Under Separate Storage pattern, when hot water supply operates, enter to exercise the cold-producing medium of circulation in refrigerating circulatory device The action that the higher boiling composition (second refrigerant) of composition increases.

Cross valve 31 is attached as shown by the solid line, and the discharge unit of compressor 30 connects with the inlet portion utilizing side heat exchanger 32 Connect, and the export department of heat source side heat exchanger 35 is connected with the sucting of compressor 30.The first magnetic valve by the first pipe arrangement 50 46 and the 3rd the 3rd magnetic valve 48 of pipe arrangement 52 be set to out, the second magnetic valve 47 of the second pipe arrangement 51 is set to close.

Now, from compressor 30 discharge high pressure gas refrigerant a part from the first magnetic valve 46 by and set The capillary 44 as the second decompressor of the entrance side being placed in the bottom of cold-producing medium rectifier 40 is decompressed to intermediate pressure, with The bottom of rear inflow cold-producing medium rectifier 40, a part for gas refrigerant rises in cold-producing medium rectifier 40.

Further, the top at cold-producing medium rectifier 40, the refrigerant vapour of rising flows into the first cooler 42, by from system The low-pressure gas-liquid two-phase system cryogen that the capillary 45 as the 3rd decompressor that the bottom of cryogen rectifier 40 connects flows out is cold But condensation liquefaction.The cold-producing medium of condensation liquefaction flows into cold-producing medium memory 41 and stores.In cold-producing medium memory 41, flow into Liquid refrigerant build up, when cold-producing medium memory 41 reaches full liquid status, the liquid refrigerant of spilling is as refrigeration The withdrawing fluid of agent rectifier 40 flows into from the top of cold-producing medium rectifier 40.

In this case, in cold-producing medium rectifier 40, the vapor refrigerant of rising is carried out with the liquid refrigerant of decline Gas-liquid contact, carries out the movement of heat and material, utilizes so-called rectifying action, the steam rising in cold-producing medium rectifier 40 The low boiling point component (the first cold-producing medium) of cold-producing medium is gradually increased, and is stored in the liquid refrigerant in cold-producing medium memory 41 gradually Become the state rich in low boiling point component (the first cold-producing medium).

And, rich in the cold-producing medium of the higher boiling composition (second refrigerant) through rectifying from cold-producing medium rectifier 40 Portion flows out.The gas-liquid two-phase cold-producing medium of this intermediate pressure enters the second cooler 43 and liquefies, via as the 3rd decompressor Capillary 45 pressurization after, become the gas-liquid two-phase cold-producing medium of low pressure, return the second cooler 43, utilize this second cooler 43 Make the gas-liquid two-phase cold-producing medium flowing out from the bottom of cold-producing medium rectifier 40 liquefy completely (supercooling state), and self become Low pressure two-phase (or steam) cold-producing medium.And, this low pressure two-phase (or steam) cold-producing medium enter the first cooler 42, to from The refrigerant vapour of the first cold-producing medium (low boiling point component) that cold-producing medium rectifier 40 is discharged carries out cooling down and making it liquefy, from the Three pipe arrangements 52 pass through and flow into the inlet portion of compressor 30.Thus, it is low that the cold-producing medium circulating in refrigerating circulatory device forms Boiling component (the first cold-producing medium) reduces, and higher boiling composition (second refrigerant) increases.

It follows that to the situation that the ratio of components of the cold-producing medium of circulation in refrigerating circulatory device is returned to standard composition Action under (discharge mode) illustrates.

In a drain mode, cross valve 31 is attached as shown by the solid line, the discharge unit of compressor 30 with utilize side heat exchange The inlet portion of device 32 connects, and the export department of heat source side heat exchanger 35 is connected with the sucting of compressor 30.By the first pipe arrangement First magnetic valve 46 of 50 is set to close, and will be arranged at the second magnetic valve 47 of the second pipe arrangement 51 and is arranged at the 3rd pipe arrangement 52 3rd magnetic valve 48 is set to out.

From the gas refrigerant of the high pressure of compressor 30 discharge via cross valve 31, utilize and carry out action as condenser Side heat exchanger 32 condensation liquefaction is utilized to become the liquid refrigerant of high pressure, after a part is over cooled device 33 supercooling, inflated Valve 34 decompression becomes the gas-liquid two-phase cold-producing medium of low pressure, flows into the heat source side heat exchanger 35 carrying out action as evaporimeter.This system Cryogen utilizes heat source side heat exchanger 35 evaporation gasification, is again attracted to compressor 30 via cross valve 31.

Further, by the another part in the liquid refrigerant of the high pressure utilizing side heat exchanger 32 to condense from the second pipe arrangement 51 The second magnetic valve 47 pass through after, pass through cold-producing medium memory 41 and lead to from cold-producing medium rectifier 40 and the second cooler 43 Cross, utilize the capillary 45 as the 3rd decompressor to become the gas-liquid two-phase cold-producing medium of low pressure, pass through simultaneously from the 3rd pipe arrangement 52 It is attracted to compressor 30.That is, the first magnetic valve 46 is set to close, the second magnetic valve 47 and the 3rd magnetic valve 48 are set to Open, utilize from the high pressure liquid refrigerant utilizing side heat exchanger 32 to discharge, from the bottom of cold-producing medium memory 41, cold-producing medium is deposited The liquid refrigerant rich in low boiling point component (the first cold-producing medium) in reservoir 41 be expressed in refrigerating circulatory device rich in height The cold-producing medium of boiling component (second refrigerant), can be by making to return rich in the cold-producing medium of low boiling point component (the first cold-producing medium) In refrigerating circulatory device, the ratio of components of cold-producing medium is returned to standard composition.

By above structure, under Separate Storage pattern, will be with the refrigeration of the standard composition being filled in refrigerating circulatory device The liquid refrigerant that agent is compared rich in low boiling point component (the first cold-producing medium) is stored in cold-producing medium memory 41, can make in system In SAPMAC method device, the ratio of components of the cold-producing medium of circulation is rich in higher boiling composition (second refrigerant).

Become the high ratio of components of the higher boiling composition (second refrigerant) of regulation by making cold-producing medium form, can suppress high On high-tension side pressure when warm water supplies rises, and can carry out high-temperature-hot-water supply.Further, if on high-tension side pressure rises, The possibility of mixed non-azeotropic refrigerant generation disproportionated reaction improves, but due to the composition of low boiling point refrigerant (the first cold-producing medium) Than declining, therefore the possibility of disproportionated reaction is suppressed.

By contrast, low boiling point refrigerant (the first refrigeration in the ratio of components of the cold-producing medium forming separative element 200 side Agent) composition increase.But, in composition separative element 200, there is not sliding part or power receiving section as compressor 30, because of This first cold-producing medium is under conditions of being not susceptible to disproportionated reaction, and security is guaranteed.

And, the ratio of components of the cold-producing medium in refrigerating circulatory device becomes the higher boiling composition (second refrigerant) of regulation After high state, the first magnetic valve 46 and the 3rd magnetic valve 4 are set to close, the ratio of components of cold-producing medium are fixed and transports Turn.

On the other hand, when beginning to use water heater etc., in the case of heating the water of low temperature, it is desirable to big heating energy Power.In this case, utilize discharge mode by the ratio of components of the cold-producing medium in refrigerating circulatory device from rich in higher boiling composition The state of (second refrigerant) returns to standard composition (filling composition) and operates.

In above-mentioned water heater, in order to tackle the change of hot water supply temperature, utilize composition separative element 200 regulation system The ratio of components of cryogen, in the same manner as embodiment one, measures the inside of compressor 30 or the pressure of discharging refrigerant or temperature Degree, (is susceptible to reaction) in the case that measured value is high temperature, high pressure, composition separative element 200 can be made with Separate Storage Pattern works.When being susceptible to the condition of disproportionated reaction of duty cryogen, the first cold-producing medium is stored in cold-producing medium storage In device 41, and can be by attracting the high cold-producing medium of ratio of components of side supply second refrigerant by compressor to compressor 30 The ratio of components of the first cold-producing medium in 30 suppresses relatively low, suppresses disproportionated reaction.

Further, the stipulated time before the compressor 30 of refrigerating circulatory device stops, by the first magnetic valve 46 and the 3rd electricity Magnet valve 48 is set to out, and makes composition separative element 200 with Separate Storage mode operation, thus stores first at cold-producing medium memory 41 The high liquid refrigerant of the ratio of components of cold-producing medium, when restarting to easy damage, the compressor easily producing the energy of local The low mix refrigerant of ratio of components of 30 supply the first cold-producing mediums, can be reliably prevented disproportionated reaction.And, from starting through Spend certain time and the operating of refrigerating circulatory device stable after perform discharge mode, make the composition of the cold-producing medium of refrigerating circulatory device Form than the standard that returns to, it can be ensured that heating efficiency.

The coupling part of the 3rd pipe arrangement 52 is the suction pipe arrangement of compressor 30, is therefore low pressure shell or height at compressor 30 In the case of pressure shell, under the low environment of the ratio of components that can make to be in the first cold-producing medium around glass terminal, motor, effectively Prevent reaction.On the other hand, moreover it is possible in the way by the compression travel that the coupling part of the 3rd pipe arrangement 52 is injected compressor 30 Reduce the ratio of components of the first cold-producing medium of high-pressure section in compression process especially.

In the refrigerating circulatory device involved by embodiment three, said structure can be utilized to reduce refrigerating cycle unit The first cold-producing medium composition in the refrigerating circulatory device of 100 sides, the dividing potential drop that can reduce the first cold-producing medium declines, and suppression occurs even The disproportionated reaction of the first cold-producing medium of lock.

In addition, be illustrated as a example by water heater in embodiment three, can adopt in air-conditioning device, cooler etc. Use this refrigerating circulatory device.

Further, in the refrigerating circulatory device involved by embodiment three, mix the first cold-producing medium and second refrigerant this Two kinds of cold-producing mediums, it is also possible to mix more than three kinds cold-producing mediums.It that case, the first cold-producing medium needs to belong to low boiling Point.By forming such composition, the ratio of components of the first cold-producing medium in the cold-producing medium of main path is high, the cold-producing medium of bypass path In the ratio of components of the first cold-producing medium low, be therefore obtained in that the effect of suppression reaction equally.

Above, embodiment one to three is illustrated, the invention is not restricted to the explanation of each embodiment, additionally it is possible to will The all or part combination of each embodiment.

For example, can use involved by embodiment three in the refrigerating circulatory device involved by embodiment one or two Composition separative element 200 and the ratio of components regulating the first cold-producing medium in refrigerating circulatory device.And, it would however also be possible to employ implement The refrigeration that refrigerating circulatory device involved by mode one or two is used as the refrigerating cycle unit 100 involved by embodiment three is followed Loop device constitutes air-conditioning system etc..

Description of reference numerals

1 compressor, 2 first condensers, 3 gas-liquid separators, 3a side outlet, 3b hydraulic fluid side exports, 4 second condensers (being equivalent to the 3rd heat exchanger of the present invention), heat exchanger between 5 cold-producing mediums, 6 first expansion valves, 7 evaporimeters, 8 main paths, 9 bypass Path, 10 second expansion valves, 11 compressors, 12 oil eliminators, 12a side outlet, 12b oil return port, 13 cross valves, Room 14 External heat exchanger, 15 outdoor expansion valves (are equivalent to the 3rd expansion valve of the present invention), 16 indoor expansion valve, 17 indoor heat exchangers, and 18 Reservoir, 19 bypass path, 20 throttling arrangements, 21 main paths, 30 compressors, 31 cross valves, 32 utilize side heat exchanger, 33 supercoolings But device, 34 expansion valves, 35 heat source side heat exchangers, 40 cold-producing medium rectifiers, 41 cold-producing medium memories, 42 first coolers, 43 Two coolers, 44 capillaries, 45 capillaries, 46 first magnetic valves, 47 second magnetic valves, 48 the 3rd magnetic valves, 50 first pipe arrangements, 51 second pipe arrangements, 52 the 3rd pipe arrangements, 100 refrigerating cycle unit, 200 composition separative elements.

Claims

1. a refrigerating circulatory device, mixed non-azeotropic refrigerant is formed cold-producing medium as standard by described refrigerating circulatory device Work, described mixed non-azeotropic refrigerant at least include the first cold-producing medium and have at the same pressure boiling point higher than described The second refrigerant of the characteristic of the first cold-producing medium, described refrigerating circulatory device includes:

Major loop, described major loop is sequentially connected with compressor, First Heat Exchanger, expansion valve and the second heat exchanger；And

Composition separating circuit, described composition separating circuit is connected with described major loop, and described refrigerating circulatory device is characterised by,

Described first cold-producing medium has the characteristic that disproportionated reaction occurs,

Described composition separating circuit has following structure, and the separation separating at the composition forming cold-producing medium to described standard is deposited When operating under storage pattern, from described major loop, isolate the ratio of components of described first cold-producing medium higher than described standard composition refrigeration The mix refrigerant of agent simultaneously stores.

2. refrigerating circulatory device according to claim 1, it is characterised in that described composition separating circuit has following knot Structure, under the discharge mode that the composition of described major loop returns to described standard composition cold-producing medium during operating, makes at described point The high mixed refrigerant stream of the ratio of components of the first cold-producing medium that isolate from described major loop and store under memory module, described Enter described major loop.

3. refrigerating circulatory device according to claim 1 and 2, it is characterised in that

Described composition separating circuit has:

Cold-producing medium rectifier, when described cold-producing medium rectifier operates under described Separate Storage pattern, to described first cold-producing medium Ratio of components higher than described standard composition cold-producing medium mix refrigerant separate；And

Cold-producing medium memory, described cold-producing medium memory is to utilizing the isolated described mix refrigerant of described cold-producing medium rectifier Store.

4. refrigerating circulatory device according to any one of claim 1 to 3, it is characterised in that described Separate Storage pattern At least work when discharge temperature or the discharge pressure height of described compressor.

5. refrigerating circulatory device according to any one of claim 1 to 4, it is characterised in that described Separate Storage pattern Stipulated time work at least before described compressor stops.

6. according to the refrigerating circulatory device according to any one of claim 3 to 5 being subordinated to claim 2, it is characterised in that Under described discharge mode, high for the ratio of components making the first cold-producing medium that be stored in described cold-producing medium memory, described is mixed The link position closing the described major loop of cold-producing medium inflow is set as the suction pipe arrangement of described compressor.

7. according to the refrigerating circulatory device according to any one of claim 3 to 5 being subordinated to claim 2, it is characterised in that Under described discharge mode, high for the ratio of components making the first cold-producing medium that be stored in described cold-producing medium memory, described is mixed The link position closing the described major loop of cold-producing medium inflow is set as in the way of compression process of described compressor.

8. refrigerating circulatory device according to any one of claim 1 to 7, it is characterised in that described first cold-producing medium is HFO1123, described second refrigerant at least includes more than one of R32, HFO1234yf, HFO1234ze.